Add multiple cross directory dynamic html pages to a single php and tpl page

I wish to add multiple dynamically generated html files into single .php and its relevant theme .tpl file. I have a site which have dynamic and static files. I have added sitemap generator script to generate sitemaps automatically. The script crawls my website and generate sitemaps in different formats. It has .html to display to public but I wish to include the .html files to the theme static page of the site in such a way that it automatically loads the content with right redirection to all the linked pages like sitemap1, sitemap2, sitemap3 and on.